KR20000012683U - Nut for fixing impeller of boiler circulation pump. - Google Patents

Abstract

The present invention relates to an impeller fixing nut of a boiler circulating pump which is able to contribute to the improvement of the quality and operability of a circulation pump by preventing leakage by preventing airtightness by maintaining airtightness in the blocking plate and the nut and the nut and the impeller shaft;

The motor unit 51 and the motor unit 51, which are composed of the rotor assembly 56 and the stator assembly 59, are press-fitted between the front housing 60 and the back housing 61 to generate rotational force necessary for pumping operation. The driving impeller 62 accommodated in the accommodation space 61 ′ of the front housing 60 and the driving impeller 62 and the multi-pole magnetic force are rotated to pump the circulating water introduced while rotating and forcibly discharged. Pumping driven impeller (63), which is coupled to the front housing 60 on the outside of the pumping driven impeller (63) and the inlet port for supplying the circulating water to be pumped and the discharge port for supplying the pumped circulating water to the heating zone In the circulation pump 50 for a circulating water boiler comprised of the drive impeller part 52 containing the out casing 67 which has 65;

An airtight member hole 105 is formed to accommodate the airtight member 81 from the front side of the nut 79 that couples the blocking plate 78 to the positive driven impeller 63 to the middle portion of the screw hole 102. When the nut 79 is tightened, the airtight member 81 is diffused to tightly seal the barrier plate 78 and the nut 79 and the bolt portion 101 and the nut 79 of the impeller shaft 80 in two directions. It can be maintained, characterized in that the nut (79) to prevent loosening.

Description

Nut for fixing impeller of boiler circulation pump.

The present invention improves the nut fixing the blocking plate coupled to the rear end of the impeller shaft to maintain the positive driven impeller of the driving impeller, so that the water leaked into the impeller shaft in the pumping process can be prevented from flowing in the direction of the driving impeller A nut for fixing an impeller of a boiler circulation pump.

Boiler circulating pump is used to force circulation of heated circulating water to the area to be heated or hot water by using oil or gas as heat source.

The circulation pump for the circulating water boiler as described above is largely composed of a motor part generating a rotational force and a driving impeller part performing a pumping operation to circulate the circulation water using the rotational force of the motor part.

The motor unit is composed of a rotor assembly and a stator assembly press-fitted between the front and back housing phases to generate rotational force necessary for pumping operation by electric energy.

A drive impeller, which is located in front of the motor part, is accommodated in the front housing and is fixed to the rotor shaft of the motor part, and has a plurality of cooling fans on a rear surface thereof by inserting a magnet of a multipole;

In the front of the driving impeller, a positive driven impeller having a plurality of impellers for accommodating a multipolar magnet on the rear side and a space formed therein for discharging the introduced circulating water is inserted onto the impeller shaft, and the impeller shaft is It is fixed with a nut at the rear of the blocking plate and magnetically coupled with the multi-pole magnet of the driving impeller to carry out pumping work by receiving external power from the motor unit with the blocking plate in between.

The pump driven driven impeller includes an inlet for introducing the circulating water to be forcedly circulated and an out casing coupled with the front housing with a discharge port for supplying the pumped circulated water to a sub-heat exchanger for heating or hot water.

The blocking plate and the blocking plate as a means for preventing the leakage of water leaked through the circulation water or impeller shaft scattered to the outside of the pump driven impeller during the operation of the circulation pump as described above. Leakage is prevented by the airtight material provided on the nut which fixes the airtight material and the blocking plate provided in the outer side with an impeller shaft.

In the case of the airtight member provided on the outside of the blocking plate is strongly pressed by the outcasing coupled to the front housing, the airtight between the outcasing and the blocking plate is maintained reliably.

However, in the case of the airtight material intervening between the nut fixing the blocker plate and the impeller shaft and the blocker plate, the airtightness is prevented due to loosening of the nut or torsion due to the rotational torque generated during tightening the nut. It has a problem that is not smooth.

If airtightness is not maintained due to the above reasons, water that penetrates or leaks between the impeller shaft and the carbon bearing phase flows into the driving impeller and the motor part, thereby deteriorating durability due to corrosion of parts, and gradually decreasing the water level of the boiler. Due to the inability to generate rotational force due to short circuits and short circuits of the coils, the circulation pump was unable to operate or heating or hot water was shut down due to insufficient water level.

Conventionally, a nut for achieving the above object is conceived and used, and a representative example is shown in FIG. 5.

In FIG. 5, the conventional nut 1 has a screw hole 5 capable of engaging a bolt portion 4 formed at an end of the impeller shaft 3 inside the body 2 having a hexagonal shape on the outside thereof. Is formed.

The outer side of the screw hole (5) forms an arc-shaped airtight groove (6), and the airtight material (7) such as an O-ring is inserted into the airtight groove (6).

When the nut 1 as described above is coupled to the impeller shaft 3, the torsion phenomenon occurs due to the rotation of the airtight member 7 due to the characteristics of the nut coupled by rotation. In the direction of rotation).

However, after a certain period of time, the nut 1 continues to be stressed when the nut 1 moves and stops due to the vibration transmitted to the blocking plate by the motor rotational force. 7) Press and hold the carbon bearing (10) and the impeller shaft (holding the positive driven impeller (9) by holding the positive driven impeller (9) due to the fact that the nut is loosened and the sealing material and the blocking plate (8) do not maintain close contact with each other). Water penetrated or leaked in 3) is leaked.

In particular, in the process of tightening the nut, the airtight material is frequently damaged by rotating in close contact with the blocking plate 8, thereby making it impossible to maintain the airtightness, or the elasticity is lowered by hardening the airtight material after a long time, so that the above-mentioned problems are more. Had worsened.

Therefore, the present invention has been made to solve the problems described above, and by improving the internal structure of the nut into which the airtight material is inserted, the airtight material can maintain the airtight in the blocking plate, the nut, the nut and the impeller shaft in two directions, thereby reducing the risk of leakage. It is intended to contribute to the improvement of the quality and operability of the circulation pump, and to prevent the water level of the boiler from being lowered.

1 is a cross-sectional view of a circulation pump for a boiler for explaining the present invention.

Figure 2 is an exploded perspective view of the impeller fixing nut applied technology of the present invention.

Figure 3 is a cross-sectional view of the impeller fixing nut applied technology of the present invention.

Figure 4 is a cross-sectional view of the state of use of the impeller fixing nut of the present invention.

Figure 5 is a cross-sectional view of the impeller fixing nut to which the prior art is applied.

* Description of the symbols used in the main parts of the drawings *

50; Circulation pump for circulating water boiler

78; Blocking plate

79; nut

80; Impeller shaft

81; Confidential

105; Confidentiality Hall

Hereinafter, with reference to the accompanying drawings will be described the configuration and operation of the present invention for achieving the above object.

1 is a cross-sectional view of a circulation pump for a boiler for explaining the present invention, Figure 2 is an exploded perspective view of the impeller fixing nut applied to the technology of the present invention, Figure 3 is a cross-sectional view of the impeller fixing nut applied technology of the present invention, Figure 4 is a cross-sectional view showing the state of use of the impeller fixing nut of the present invention.

Circulation pump 50 for the circulating water boiler is driven to perform the pumping operation to circulate the circulating water using the rotational force of the motor unit 51 and the motor unit 51 generating a rotational force as shown in FIG. The impeller portion 52 is large.

The motor unit 51 includes a rotor assembly 56 including a rotor shaft 53, a rotor 54, and a rotor ball bearing 55, a stator core 57, and a stator coil 58 wound thereon. It is composed of a stator assembly 59 located outside the assembly 56 and is pressed between the front housing 60 and the back housing 61 to generate the rotational force necessary for the pumping operation.

The driving impeller 52 located in front of the motor unit 51 has a driving impeller 62 located in the accommodation space 61 ′ formed in the front housing 60, the driving impeller 62, and a magnetic force ( Combined with the front housing 60 at the outside of the positive driven impeller 63 and the positive driven impeller 63 for forcibly discharging and circulating the drawn-in circulating water while being rotated in a spiral manner. It is largely composed of an out casing 67 having an inlet 64 and a discharge port 65 for supplying the pumped circulating water to a heating or hot water region.

The drive impeller 62 has a rotor shaft formed by inserting a magnet 70 having a multi-pole in the front side, and having a plurality of cooling fans (suction fans) 71 in the rear to introduce external air into the motor unit 51. It is fixed at 53.

The positive driven impeller 63 coupled to the driving impeller 62 by magnetic force receives a magnet 72 on the rear surface of the driving impeller 62 and communicates with an inlet hole 74 formed in the cover 73. A plurality of impellers 76 are formed in the inner space 75 to discharge the introduced circulating water.

At the center of the pump driven impeller 63, an impeller shaft 80 in which a carbon bearing 77 is inserted and coupled, and a blocking plate 78 having a thrust disc ceramic washer 82 interposed therebetween is fixed with a nut 79. Is maintained.

Of course, the circulating water supplied between the blocking plate 78 and the out casing 67 phase, the blocking plate 78 and the nut 79 via an airtight material 81 such as an O-ring or a packing plate is the blocking plate 78. And it is configured to block the flow in the direction of the driving impeller 62 through the carbon bearing 77 and the impeller shaft 80.

In the present invention, by improving the nut 79 for coupling the blocking plate 78 with the pumping driven impeller 63, it is possible to more easily maintain the airtight to solve the problem that may be caused by the leak phenomenon.

Nut 79 of the present invention for achieving the above object is in Figure 4;

The center of the hexagonal body 100 is formed with a screw hole 102 to be coupled to the bolt portion 101 formed at the end of the impeller shaft (80).

A triangular hermetic material hole 105 is formed to accommodate the hermetic material 81 from the front side of the nut 79 to the middle portion of the screw hole 102.

The operation of the present invention configured as described above;

The circulation pump 50 for the circulating water boiler connects the tubular body drawn out from the heating means of the boiler to the inlet 64 formed in the outer case 67, and the outlet 65 connects to the piping of the heating zone to form the inside of the casing of the boiler. Install on.

When the boiler is operated in this state, the motor unit 51 of the pump 50 rotates and the rotation of the motor unit 51 is transmitted to the drive impeller 62 fixed to the rotor shaft 53, and the drive impeller 62. Since the positive driven impeller 63 is attracted by the magnetic force of the multipole, the positive driven impeller 63 operates to draw in the circulating water to perform the pumping, and the pumped circulated water is discharged from the outcasing 67 ( 65 is discharged to the heating or hot water area.

In the process of circulating the circulating water as described above to be introduced through the carbon bearing 77 or the impeller shaft 80 holding the pump driven impeller 63 in the process of pumping the circulating water introduced through the out casing (67). In this case, the inflow in the direction of the driving impeller 62 is blocked by the nut 79 holding the blocking plate 78 in close contact with the rear of the positive driven impeller 63 and the airtight member 81 inserted therein.

This is an airtight material inserted into an inside of a nut 79 coupled to a bolt portion 101 formed at a rear end of an impeller shaft 80 in close contact with the rear of the pump driven impeller 63. This is because water leakage is prevented by 81).

Looking at this in detail, the airtight material 81 inserted into the roughly triangular airtight material hole 105 formed from the front side of the nut 79 to the middle portion of the screw hole 102 is pressed by the tightening of the nut 79 to spread. Thus, it is deformed into the same shape as the hermetic material hole 105.

Therefore, the deformed airtight member 81 has a gap between the rear surface of the blocking plate 78 and the upper surface of the airtight member hole 105 of the nut 79 and between the airtight member hole 105 and the bolt portion 101 of the impeller shaft 80. By being in close contact with these two directions, the water infiltration is fundamentally blocked, and the frictional resistance is increased to solve the loosening phenomenon.

The present invention as described above improves the internal structure of the nut into which the airtight material is inserted, thereby preventing leakage and nut loosening by maintaining airtightness in the blocking plate and the nut and the nut and the impeller shaft in two directions, thereby improving the quality of the circulation pump and boiler operability. It can contribute to the effect.

Claims (2)

A rotor assembly 56 including a rotor shaft 53, a rotor 54, and a rotor ball bearing 55, and a stator core 57 and a stator coil 58 wound around the rotor shaft 56 are formed on the outer side of the rotor assembly 56. A motor unit 51 composed of a stator assembly 59 positioned to be press-fitted between the front housing 60 and the back housing 61 to generate rotational force necessary for pumping operation; A driving impeller 62 configured to include a multipolar magnet 70 and a cooling fan 71 in front of the motor unit 51 and accommodated in a receiving space 61 'formed in the front housing 60; A positive driven impeller (63) having a multi-pole magnet (72) and an impeller (76), coupled with a driving impeller (62) and a magnetic force of the multi-pole, for pumping and forcibly discharging the circulating water drawn therein; Out casing having an inlet 64 for supplying the circulating water to be pumped and the discharge port 65 for supplying the pumped circulating water to the heating zone at the outside of the pumping driven impeller 63. In the circulation pump 50 for a circulating water boiler comprised of the drive impeller part 52 containing 67; An airtight member hole 105 is formed to accommodate the airtight member 81 from the front side of the nut 79 that couples the blocking plate 78 to the positive driven impeller 63 to the middle portion of the screw hole 102. To form; The airtight member 81 diffuses by tightening the nut 79 to maintain airtightness in the blocking plate 78 and the nut 79, the bolt portion 101 and the nut 79 of the impeller shaft 80 in two directions. Impeller fixing nut of the boiler circulating pump, characterized in that to enable. The method of claim 1; The airtight material hole 105 formed in the nut 79 has an impeller fixing nut of a boiler circulation pump, characterized in that the cross-sectional shape is triangular.